DTS already does this. Go to Expenses and click Create Expense from GTC Statement or something like that.
Thoughts (not GO safe...sanitize!) --
From an AMC standpoint, the most frustrating thing about DTS is the amount of information that has to be put in prior to going TDY and then all that information has to be edited once we have returned. When I am TDY 6-9 times a month and I have to enter (6-9)*2 things into DTS (Auth + Voucher), I get annoyed. Especially when we put "Variations Authorized" in the Auth and then DTS throws a shitfit when we change the itinerary for the Voucher upon our return. Also, the -$16 glitch is super annoying when trying to select OINC for $3.50 a day when directed. Finally, the AF infatuation with 6-9 popups per web application is super fucking annoying.
Lose the finance jargon in every step of the process. Most of us don't speak it.
My favorite feature is the page that lets me adjust the split disbursement. However, everything good comes with a price, and if I use the feature, I then have to justify 6-9 flags for changing the split disbursement.